Slider would NOT work properly when it'd be put in the folder whose name include space

Describe the bug
With Touch Bar customization, Brightness and Volume sliders would NOT work properly when I put them in the folders while the name of the folder would have space in it, for example, "Now Playing".

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
Touch Bar

Device information:

  • Type of Mac: MacBook Pro (13-inch, M1, 2020)
  • macOS version: macOS Big Sur (11.4)
  • BetterTouchTool version: 3.570(1710)

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):
We can avoid this bug with the folder name without any spaces, for example, "NowPlaying"